1 //===-- Common constants for math functions ---------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_LIBC_SRC_MATH_GENERIC_COMMON_CONSTANTS_H
10 #define LLVM_LIBC_SRC_MATH_GENERIC_COMMON_CONSTANTS_H
11 
12 namespace __llvm_libc {
13 
14 // Lookup table for (1/f) where f = 1 + n*2^(-7), n = 0..127.
15 extern const double ONE_OVER_F[128];
16 
17 // Lookup table for log(f) = log(1 + n*2^(-7)) where n = 0..127.
18 extern const double LOG_F[128];
19 
20 } // namespace __llvm_libc
21 
22 #endif // LLVM_LIBC_SRC_MATH_GENERIC_COMMON_CONSTANTS_H
23